PURPOSE:To make easier the correction of printed letters by using a control means by which the content of memory means is read out when the correction of printed letters is needed, and according to the results, a carriage is returned in comply with a moving amount corresponding to the sizes of each letter. CONSTITUTION:A printer is provided with alphabet letter keys KA-KZ, numeral keys, control keys K1-K5 and shift key K6 for indicating small letters. Also, a carriage CA is provided with a memory device LB for correcting printed letters. During the printing operation by a printing head, the moving amounts of the carriage CA according to the sizes of each letter are stored by a carriage position counter CC. When the correction of printed letters is needed, the content of the counter CC is read out, and the carriage CA is returned according to moving amounts corresponding to the sizes of each letter in reponse to the read out results by controlling it by a centralized processor CPU.